(19)

(11)

EP 4 018 686 A2

(12)

(88) Date of publication A3: 01.04.2021 (43) Date of publication: 29.06.2022 Bulletin 2022/26 (21) Application number: 20761482.7 (22) Date of filing: 19.08.2020

(51) International Patent Classification (IPC):  H04S 7/00(2006.01) (52) Cooperative Patent Classification (CPC): H04S 7/30; H04S 2420/01; H04S 2420/03 (86) International application number: PCT/US2020/047079 (87) International publication number: WO 2021/034983 (25.02.2021 Gazette 2021/08)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 19.08.2019 WO PCT/CN2019/101291 05.09.2019 US 201962896321 P 19.12.2019 EP 19218142 02.01.2020 US 202062956424 P (71) Applicant: Dolby Laboratories Licensing Corporation San Francisco, CA 94103 (US)

(72) Inventors: BIN, Qingyuan Beijing 100020 (CN) LUO, Libin Beijing 100020 (CN) YANG, Ziyu Beijing 100020 (CN) SHUANG, Zhiwei Beijing 100020 (CN) YU, Xuemei Beijing 100020 (CN) WANG, Guiping Beijing 100020 (CN) (74) Representative: Dolby International AB Patent Group Europe  Mr. Treublaan 7 1097 DP Amsterdam 1097 DP Amsterdam (NL)